US 11,929,638 B2
Full DC voltage power backup system for wind turbine
Morten Bagger Søgaard, Thisted (DK); Niels Erik Danielsen, Brabrand (DK); Alun Jones, Hørning (DK); and Carsten Lindgaard Jensen, Silkeborg (DK)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 17/611,836
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
PCT Filed May 15, 2020, PCT No. PCT/DK2020/050138
§ 371(c)(1), (2) Date Nov. 16, 2021,
PCT Pub. No. WO2020/228918, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. PA 2019 70313 (DK), filed on May 16, 2019.
Prior Publication US 2022/0224145 A1, Jul. 14, 2022
Int. Cl. H02J 9/06 (2006.01); F03D 7/02 (2006.01); F03D 9/11 (2016.01); H02J 1/10 (2006.01)
CPC H02J 9/061 (2013.01) [F03D 7/0264 (2013.01); F03D 9/11 (2016.05); H02J 1/106 (2020.01); F05B 2270/1071 (2013.01); F05B 2270/337 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wind turbine comprising:
an internal power supply grid for distributing power to a number of power consuming units of the wind turbine; and
a power backup system connected to the internal power supply grid for supplying power to said internal power supply grid during a grid fault, wherein the power backup system comprises a plurality of series connected power storage units that provide a total backup voltage that falls within a nominal voltage range of the internal power supply grid such that a voltage level of the total backup voltage from the plurality of series connected power storage units is unmodified when provided by the power backup system to the internal power supply grid.